$$\text{OH}^- + \text{H}^+ \rightarrow \text{H}_2\text{O}$$

$$n = \frac{P V}{R T} = \frac{1.00 \times 22.4}{0.0821 \times 273} \approx 1.00$$

$$\text{Percent Yield} = \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\%$$

Question 1

Which of the following best describes the main focus of modern chemistry as outlined in the course description?

Accepted Answer

The development and understanding of natural environment through chemical principles.

Question 2

Which chapter would most likely cover the calculation of molar mass and unit conversions?

Accepted Answer

Chapter 1: Introduction—matter and measurement

Question 3

A student is asked to predict the molecular geometry of $$	ext{SF}_6$$ using VSEPR theory. Which is the correct geometry?

Accepted Answer

Octahedral

Question 4

Which equation would you use to relate the pressure, volume, and temperature of a gas under non-ideal conditions?

Accepted Answer

$$\left( P + \frac{a n^2$}{V^2$} \right) (V - n b) = n R T$$

Question 5

Which of the following is NOT a competency outcome for this course?

Accepted Answer

Mastery of advanced organic synthesis techniques.

Question 6

A chemical reaction releases 250 kJ of energy. Which term best describes this process?

Accepted Answer

Exothermic

Question 7

Which chapter would most likely discuss the application of quantum theory to simple chemical systems?

Accepted Answer

Chapter 8: Electrons in atoms

Question 8

A student mixes 0.50 mol of $$	ext{NaOH}$$ with 0.50 mol of $$	ext{HCl} in $$water. What is the net ionic equation for the reaction?

Accepted Answer

$$	ext{OH}^- + 	ext{H}^+ ightarrow 	ext{H}_2	ext{O}$$

Question 9

Which of the following best explains why technological innovation is important in chemistry?

Accepted Answer

It improves the quality of life by enabling new materials and processes.

Question 10

Which formula is used to calculate the energy of a photon given its frequency?

Accepted Answer

$$E = h 
u$$

Question 11

A student is asked to explain the difference between a Lewis structure and a molecular orbital diagram. Which statement is correct?

Accepted Answer

Molecular orbital diagrams show the overlap of atomic orbitals to form molecular orbitals.

Question 12

Which chapter would most likely cover the periodic table and atomic properties?

Accepted Answer

Chapter 9

Question 13

A sample of gas at 1.00 atm and 273 K occupies 22.4 L. How many moles of gas are present?

Accepted Answer

$$n = \frac{P V}{R T} = \frac{1.00 	imes 22.4}{0.0821 	imes 273} \approx 1.00$$

Question 14

Which of the following is a correct statement about chemical bonding?

Accepted Answer

Covalent bonds involve the sharing of electrons between atoms.

Question 15

Which equation is used to calculate the percent yield of a chemical reaction?

Accepted Answer

$$	ext{Percent Yield} = \frac{	ext{Actual Yield}}{	ext{Theoretical Yield}} 	imes 100\%$$

Question 16

Which of the following is a real-world application of intermolecular forces?

Accepted Answer

The boiling point of water is higher than expected due to hydrogen bonding.

Question 17

Which chapter would most likely discuss acids and bases?

Accepted Answer

Chapter 16

Question 18

A student is asked to use the Bohr model to calculate the energy of an electron in the $$n=2$$ level of hydrogen. Which equation should they use?

Accepted Answer

$$E_n = - \frac{2.18 	imes 10$$^{-18}$$ 	ext{J}}{n^2$}$$

Question 19

Which of the following best describes the role of laboratory safety goggles in chemistry experiments?

Accepted Answer

They prevent chemical splashes from reaching the eyes.

CH 101 Chemical Principles I – Syllabus and Study Guide

Study Guide - Practice Questions